Teens and young adults who get seriously injured in an assault are nearly twice as likely as their peers to end up back in the emergency room for a violent injury within the next two years, a new University of Michigan Injury Center study finds. The researchers call this repeating pattern of violent injury a reoccurring disease, but their study also suggests potentially powerful opportunities to intervene in ways that could stop the cycle.

What do skipping school, failing tests and engaging in risky sexual behavior have in common? Lots, according to Indiana University researchers who combed through 80,000 daily reports written by 14- to 17-year-old girls.

There's a lot of argument over how teenage marijuana use might affect people through life, but distressingly little data to help figure it out. That leaves parents, policymakers and young people pretty much in the dark when it comes to making decisions about use and legalization.

Three long-running studies of teenagers and young adults in Australia and New Zealand might help. An analysis of the studies found a dose-response relationship: The more someone smoked pot as a teenager, the more likely that person would struggle as a young adult.

Many parents have pushed for a later start to the school day for teenagers, with limited success. But parents just got a boost from the nation's pediatricians, who say that making middle and high schoolers start classes before 8:30 a.m. threatens children's' health, safety and academic performance.

Many studies have shown that the average adolescent doesn’t get enough sleep, and that can cause physical and mental health issues. The American Academy of Pediatrics (AAP) is now recommending middle and high schools delay their class start times to 8:30 a.m. or later.

Content on this site provides general information relating to health and is not intended to be a substitute for consultation